A quality spare magazine is one of the most cost-effective upgrades you can make to improve reliability and readiness for range sessions or duty use. A robust replacement should pair precise fit with durable materials so it feeds consistently under stress.
PROMAG S&W 5900
HWK XL 5.56 Giveaway
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Design and construction
The PROMAG S&W 5900 is a doublestack replacement magazine built specifically for Smith & Wesson 910, 915, 459, and 5900 pistols. Promag’s approach blends a heat-treated blued steel body with polymer components for a balance of strength and reduced weight. The body’s heat-treated blued steel provides wear resistance where it matters most — the feed lips and magazine walls — helping maintain consistent geometry over time.
Materials that matter
This magazine uses a follower lockplate and baseplate molded from a proprietary DuPont Zytel-based black polymer, giving positive engagement with the frame while resisting impact and environmental exposure. The spring is wound from chrome-silicon wire and heat-treated for strength and longevity — a critical detail for maintaining proper feed pressure across many cycles.
Fit, function, and value
Fitment for S&W 910/915/459/5900 series pistols is a key benefit; the doublestack design increases capacity without sacrificing ergonomics. The Promag brand has a history of aftermarket components, and the model designation listed as Various reflects compatibility across those Smith & Wesson shooters. At $19.99, this magazine is a budget-friendly spare that emphasizes durable materials and practical performance.
For tactical trainers and everyday carriers who want spare mags that hold up, the PROMAG S&W 5900 delivers a straightforward, serviceable solution. View product details and pricing on our shop page to confirm fit and availability.
Practical takeaways
Expect a heat-treated blued-steel body, Zytel-based polymer follower lockplate and baseplate, and a heat-treated chrome-silicon spring that together offer reliable feeding at an economical price point. Check current availability and pick up a spare at Check current availability.
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People Also Ask
What makes this product stand out from competitors?
This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.
Is this product suitable for beginners?
Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.
What warranty or support is available?
The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.
How does this compare to similar products in its price range?
This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.
What maintenance is required?
Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.
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